Improvement in elevators for buildings



Nrrun TA'rEs ISAAC S. SOHUYLER AND SAMUEL I. THURSBY, VOIE BROOKLYN, E. D., NEW YORK.

IMPROVEMENT IN ELEVATORS FOR BUILDINGS.

Specification forming part of Letters Patent No. 140,02, dated June 17, 1873 application filed November 9, 1872.

To all whom it may concern:

Be it known that we, IsAAc S. SGHUYLER and SAMUEL I. '.IHURsBY, of Brooklyn, E. D., in the county of Kings and State of New York, have invented an Improvement in Elevators for Buildings; and the following is declared to be a correct description of the same.

Platforms and cars have been raised or lowered by a hydraulic cylinder and ram placed below the car or platform. In this case the cylinder had to be sunk in a well as deep as the height to which the platform is to be raised from the first story, and the ram made sufficiently strong to avoid the risk of being bent under the strain to which it is subjected; or else the ram has been made of a series of telescopic tubes that are liable to become wedged and bent, or else to leak at the joints. Our invention is made for obviating these difficulties; and consists in a tube running up above .the greatest height to which the platform is to be raised, and containing a piston and a rod passing' through a gland or packing and attached to the upper part of the car or platform. Into this tube liquidsuch as water, or oil, or glycerine-is to be forced, by a suit-able pump, to raise the platform, or from which such liquid is allowed to run back into a tank as the platform or car runs down.

By this construction the weight is suspended instead of supported. lhe "rod is not liable to be bent, and hence can be smaller and the apparatus less costly. rIhe tube can eX- tend up above the building without detriment or cost other than for the tube, and may be used as a flag-staff or otherwise ornamented.

In many cases the tube can be within the building, where the elevator only reaches from the cellar to the second or third ioors.

In the drawing, a c represent portions of the floors of a building, b the roof of the same, and c a part of the front or wall, our improvement being shown by a vertical section of the parts. el d are guides of any suitable character for the car or platform e, and this car or platform is of any desired character. From the upper part of the car or platform a rod or band, e', of metal, of suitable size, or a wire rope, or a wire rope within a tube, extends up to the tube j', and is connected with the piston g that slides within that tube f, and said rod or its equivalent passes through a suitable gland or packing at h. A pump represented at It is operated by hand or otherwise, preferably continuous ly by an engine, to draw liquid out ofthe tank Z, and force it into the tube f to elevate the platform or car by acting upon the piston g,- or the liquid may be directed back into the tank when the car is standing still or running down 5 and the valves or cocks that give direction to the liquid should be under the control of the attendant on the car or platform, or otherwise through the agency of a rope, rod, or similar connection, extending the length of the elevators.

The cock 2 is for opening or closing the passage from the pump to the tube j', and when this is closed the platform will remain stationary, and the liquid may escape by a safety-valve from the pump and run back to the tank. When the valve 3 or cock is opened the liquid can run from the pipe back into the tank, and thereby the platform will be allowed to descend.

We lare aware that a hydraulic jack has been made, in which the article to be lifted is drawn by the rod of a piston. In this case the pumps were placed in the cylinder, and the apparatus was not adapted to an elevator for buildings.

We claim as our invention- An elevator for buildings, composed of a tube extending above the elevator containing a piston and rod, in combination with the car or platform running in guides, a tank for liquid and a separate actuating-pump, substantially as set forth.

Signed byjus this 25th dayof October, A. D. 1872.

ISAAC S. SCHUYLER.

SAML. I. THURSBY.

Witnesses GEO. T. PINCKNEY, CHAs. H. SMITH. 

